Mercurial > hg > octave-lojdl > gnulib-hg
annotate tests/test-trunc-ieee.c @ 15681:c21e706c88b2
Tests for module 'shutdown'.
* modules/shutdown-tests: New file.
* tests/test-shutdown.c: New file.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 20 Sep 2011 21:38:04 +0200 |
| parents | 97fc9a21a8fb |
| children | 8250f2777afc |
| rev | line source |
|---|---|
| 13983 | 1 /* Test of rounding towards zero. |
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maint: update almost all copyright ranges to include 2011
Jim Meyering <meyering@redhat.com>
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2 Copyright (C) 2010-2011 Free Software Foundation, Inc. |
| 13983 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 #include <config.h> | |
| 18 | |
| 19 #include <math.h> | |
| 20 | |
| 21 #include "minus-zero.h" | |
| 22 #include "macros.h" | |
| 23 | |
| 24 int | |
| 25 main () | |
| 26 { | |
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27 /* See IEEE 754, section 6.3: |
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28 "the sign of the result of the round floating-point number to |
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Bruno Haible <bruno@clisp.org>
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29 integral value operation is the sign of the operand. These rules |
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30 shall apply even when operands or results are zero or infinite." */ |
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Bruno Haible <bruno@clisp.org>
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31 |
| 13983 | 32 /* Zero. */ |
| 33 ASSERT (!signbit (trunc (0.0))); | |
| 34 ASSERT (!!signbit (trunc (minus_zerod)) == !!signbit (minus_zerod)); | |
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35 /* Positive numbers. */ |
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36 ASSERT (!signbit (trunc (0.3))); |
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37 ASSERT (!signbit (trunc (0.7))); |
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Bruno Haible <bruno@clisp.org>
parents:
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38 /* Negative numbers. */ |
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Bruno Haible <bruno@clisp.org>
parents:
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39 ASSERT (!!signbit (trunc (-0.3)) == !!signbit (minus_zerod)); |
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Bruno Haible <bruno@clisp.org>
parents:
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40 ASSERT (!!signbit (trunc (-0.7)) == !!signbit (minus_zerod)); |
| 13983 | 41 |
| 42 return 0; | |
| 43 } |